The Regensburg Model Scenario Types RM 1 – 6 are used to derive plausible emission paths that meet a given budget. The innovative core of the RM Scenario Types is that emission paths are determined indirectly by assumptions about the trajectory of annual changes. A web app illustrating the properties of the scenario types is available here: https://paths.climate-calculator.info.
Wolfsteiner et al. (Mon,) studied this question.